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FAIR VALUE MEASUREMENTS - Schedule of Changes in Nonfinancial Liabilities Related to Warrant Obligations Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details) - Recurring - Total warranty obligations measured at fair value - Level 3 - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance at beginning of period | $ 38,037 | $ 21,132 | $ 28,736 | $ 19,806
Accruals for warranties issued during period | 4,780 | 1,939 | 11,993 | 4,229
Changes in estimates | 1,980 | 1,279 | 7,318 | 2,877
Settlements | (2,838) | (1,940) | (6,663) | (5,444)
Increase due to accretion expense | 1,260 | 832 | 3,307 | 2,410
Other | 2,081 | 2,506 | 609 | 1,870
Balance at end of period | $ 45,300 | $ 25,748 | $ 45,300 | $ 25,748

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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Increase (Decrease) in Other + References No definition available. + Details
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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Warranties Issued + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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